Trolley trundle braking system device

Abstract

The utility model discloses a trolley trundle braking system device which comprises a braking elastic piece, an elastic piece idler wheel, a first reset spring, a ratchet wheel, a pawl, a fixing machine frame and a connecting machine frame, concave faces and convex faces are evenly distributed on the surface of the ratchet wheel in the radial direction in an adjacent mode, and the elastic piece idler wheel is arranged on the braking elastic piece. The connecting rack drives the ratchet wheel to rotate unidirectionally through the pawl, so that the elastic sheet roller is sequentially propped against the concave surface and the convex surface, and the brake elastic sheet is provided with a friction surface; when the connecting rack is pressed down by external force and the elastic sheet roller abuts against the concave surface, the friction surface is separated from the surface of the trundle, and the connecting rack is in a brake releasing state; under the action of external force downward pressing, when the elastic piece rolling wheels abut against the convex faces, the friction faces abut against the surfaces of the trundles to be in a braking state, the trolley is prevented from being out of control or sliding, the operation safety and experience feeling of the trolley can be improved, and the problems that in the prior art, a trolley is not provided with a braking system device, and the trolley cannot be braked are solved. The safety and the experience feeling are very poor.

Description

TECHNICAL FIELD

[0001] The present application relates to the trolley technical field, more particularly, to a trolley caster brake system device. BACKGROUND

[0002] The flat trolley is also called flat trolley, which is a kind of carrying tool for carrying by manpower. As an important carrying tool, it is widely used in many fields. At present, the trolley on the market may be generally without brake system device due to cost consideration, design limitation or user demand difference and other factors, and the safety and experience are very poor. With the increasing emphasis on safety and the continuous progress of technology, a brake system device specially applied to trolley is needed to be developed to improve the safety, experience and competitiveness of trolley products.

[0003] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a trolley caster brake system device. The device is located at the bottom of the trolley and adopts an easy-to-operate design. The device main body is composed of a ratchet mechanism, which is a one-way intermittent motion mechanism composed of a ratchet and a pawl. The user only needs to step on it lightly to realize brake, and then repeat the same direction to release the brake, which has excellent use experience. At the same time, it has the following advantages:

[0004] 1. Convenient operation: the design of brake device conforms to the principle of ergonomics, so that the user can easily operate at any angle.

[0005] 2. Safety: in emergency, the brake device can respond quickly to provide reliable safety protection and prevent the trolley from running out of control or sliding.

[0006] 3. Durability: the brake device is made of wear-resistant metal material and can maintain stable braking performance for a long time. CONTENT OF THE UTILITY MODEL

[0007] The embodiment of the present application provides a trolley caster brake system device, which comprises brake spring, spring roller, first reset spring, ratchet, pawl, fixed frame and connecting frame. In emergency, the brake system device can respond quickly to provide reliable safety protection and prevent the trolley from running out of control or sliding, so as to improve the operation safety and experience of the trolley.

[0008] In order to solve the above technical problems, the embodiment of the present application provides a,

[0009] The technical scheme adopted is as follows:

[0010] The application provides a trolley caster brake system device, which comprises brake spring sheets, spring sheet rollers, first return springs, a ratchet wheel, a pawl, a fixed frame and a connecting frame, the rear end of the fixed frame is hingedly connected to the front end of the connecting frame;

[0011] The ratchet wheel is rotatably arranged at the front end of the connecting frame, and concave surfaces and convex surfaces are uniformly distributed on the surface of the ratchet wheel in the radial direction, the brake spring sheets are hingedly arranged on the fixed frame, and the spring sheet rollers are arranged on the brake spring sheets.

[0012] The ratchet wheel is further provided with a plurality of teeth, the pawl is movably arranged at the front end of the connecting frame, one end of the first return spring is arranged on the connecting frame, and the other end of the first return spring presses the pawl, so that the pawl abuts against the teeth.

[0013] Under the action of external force, the connecting frame drives the ratchet wheel to rotate in one direction through the pawl, and then the spring sheet rollers successively abut against the concave surfaces and the convex surfaces.

[0014] In some embodiments, the concave surfaces are four, and the convex surfaces are four.

[0015] In some embodiments, the angle of each one-way rotation of the connecting frame driving the ratchet wheel through the pawl is 45°.

[0016] In some embodiments, the device further comprises a wheel foot support and a caster, the caster is arranged at the bottom end of the wheel foot support, and the front end of the fixed frame is arranged on the wheel foot support.

[0017] In some embodiments, the device further comprises a first screw rod and a second return spring, the first screw rod penetrates the front end of the connecting frame, the second return spring and the ratchet wheel, one side of the second return spring abuts against the fixed frame, and the other side of the second return spring abuts against the connecting frame.

[0018] In some embodiments, the device further comprises a second screw rod, the second screw rod penetrates the fixed frame and the brake spring sheets, so that the brake spring sheets are hingedly arranged on the fixed frame.

[0019] In some embodiments, the device further comprises a third screw rod, the third screw rod penetrates the fixed frame, so that one side of the second return spring abuts against the fixed frame.

[0020] In some embodiments, the brake spring sheets are provided with friction surfaces.

[0021] Under the action of external force, when the spring sheet rollers abut against the concave surfaces, the friction surfaces and the surface of the caster are separated from each other, and the device is in a “braking release” state;

[0022] Under the action of external force, when the spring sheet rollers abut against the convex surfaces, the friction surfaces and the surface of the caster abut against each other, and the device is in a “braking” state.

[0023] In some embodiments, a pedal is further included, and the pedal is fixedly arranged at the rear end of the connecting frame.

[0024] In some embodiments, a trolley body is further included, and the trolley body is arranged on the fixed frame.

[0025] Compared with the prior art, the embodiments of the application have the following beneficial effects:

[0026] The trolley caster brake system device comprises brake springs, spring rollers, first return springs, a ratchet wheel, a pawl, a fixed frame and a connecting frame, the rear end of the fixed frame is hingedly connected with the front end of the connecting frame; the ratchet wheel is rotatably arranged at the front end of the connecting frame, the surface of the ratchet wheel is uniformly provided with concave surfaces and convex surfaces in the radial direction, the brake springs are hingedly arranged on the fixed frame, and the spring rollers are arranged on the brake springs; the ratchet wheel is further provided with a plurality of teeth, the pawl is movably arranged on the front end of the connecting frame, one end of the first return spring is arranged on the connecting frame, and the other end of the first return spring presses the pawl, so that the pawl abuts against the teeth; under the action of external force, the connecting frame drives the ratchet wheel to rotate in one direction through the pawl, and then the spring rollers successively abut against the concave surfaces and the convex surfaces, and the brake springs are provided with friction surfaces; under the action of external force, when the spring rollers abut against the concave surfaces, the friction surfaces are separated from the surface of the caster, and are in a "braking release" state; under the action of external force, when the spring rollers abut against the convex surfaces, the friction surfaces abut against the surface of the caster, and are in a "braking" state; in an emergency, the brake system device can quickly respond, provide reliable safety protection, prevent the trolley from losing control or sliding, improve the operation safety and experience of the trolley, and solve the problems that the trolley in the prior art is not provided with a brake system device, and the safety and experience are very poor. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the schemes in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 It is a whole structure schematic view of the trolley caster brake system device of the utility model embodiment.

[0029] Figure 2 It is a whole structure schematic view of the trolley caster brake system device of the utility model embodiment. Figure 1 It is an exploded structure schematic view of the trolley caster brake system device.

[0030] Figure 3 It is an exploded structure schematic view of the trolley caster brake system device. Figure 1 It is a ratchet wheel structure schematic view in the trolley caster brake system device.

[0031] Figure 4 For Figure 1 The first reset spring, ratchet, brake sheet and sheet roller structure schematic diagram in the trolley wheel brake system device;

[0032] Figure 5 For Figure 4 The structure schematic diagram of another angle of the first reset spring, ratchet, brake sheet and sheet roller;

[0033] Figure 6 For Figure 1 The structure schematic diagram of hidden wheel support and wheel in the trolley wheel brake system device;

[0034] Figure 7 For Figure 1 The structure schematic diagram of the trolley wheel brake system device in "braking state";

[0035] Figure 8 For Figure 1 The structure schematic diagram of the trolley wheel brake system device in "unbraking state";

[0036] Figure 9 For Figure 1 The structure schematic diagram of the trolley wheel brake system device installing step lever;

[0037] Figure 10 For Figure 1 The structure schematic diagram of the trolley wheel brake system device installing step lever and trolley body.

[0038] Reference signs:

[0039] 1, wheel support; 2, wheel; 3, brake sheet; 31, friction surface; 4, sheet roller; 5, first reset spring; 6, ratchet; 61, concave surface; 62, convex surface; 63, gear tooth; 7, pawl; 8, fixed frame; 9, connecting frame; 91, rectangular hole; 10, first screw; 11, second reset spring; 12, second screw; 13, third screw; 14, step lever; 15, trolley body. DETAILED DESCRIPTION

[0040] Below, the present application is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0041] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, a connection through an intermediary medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0043] The terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequential sequence. In addition, the terms "including," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to the process, method, product, or apparatus.

[0044] The present application embodiment provides a wheelbarrow caster brake system device, such as Figures 1 to 10 As shown, the trolley caster brake system device includes a brake spring 3, a spring roller 4, a first return spring 5, a ratchet 6, a pawl 7, a fixed frame 8, a connecting frame 9, a caster bracket 1, a caster 2, a first screw 10, a second return spring 11, a second screw 12, a third screw 13, a pedal 14 and a trolley body 15.

[0045] The caster wheel 2 is arranged at the bottom end of the caster support 1, the fixed frame 8 is arranged at the front end of the caster support 1, the rear end of the fixed frame 8 is hingedly connected with the front end of the connecting frame 9, the first screw rod 10 penetrates through the front end of the connecting frame 9, the second reset spring 11 and the ratchet wheel 6, so that the ratchet wheel 6 is rotatably arranged at the front end of the connecting frame 9.

[0046] The third screw rod 13 penetrates through the fixed frame 8, so that one side of the second reset spring 11 abuts against the fixed frame 8, and the other side of the second reset spring 11 abuts against the connecting frame 9; after the connecting frame 9 is pressed under external force and the external force is removed, the connecting frame 9 returns to the original position under the elastic force of the second reset spring 11.

[0047] The ratchet wheel 6 is uniformly provided with concave surfaces 61 and convex surfaces 62 radially adjacent to each other on the surface of the ratchet wheel 6, wherein the concave surfaces 61 are four in number, and the convex surfaces 62 are four in number, and the ratchet wheel 6 is further provided with eight teeth 63.

[0048] In the embodiment, the number of the concave surfaces 61 is four, and in other embodiments, the number of the concave surfaces 61 can be changed according to actual conditions, for example, the number of the concave surfaces 61 can be two, or the number of the concave surfaces 61 can be six.

[0049] The connecting frame 9 is provided with a rectangular hole 91 at the front end of the connecting frame 9, so that the pawl 7 is movably arranged at the front end of the connecting frame 9, one end of the first reset spring 5 is arranged on the connecting frame 9 through a rivet, and the other end of the first reset spring 5 presses the pawl 7, so that the pawl 7 abuts against the teeth 63. Under the action of the external force pressing the connecting frame 9, the connecting frame 9 drives the ratchet wheel 6 to rotate in one direction through the pawl 7 (the angle of each one-way rotation of the ratchet wheel 6 driven by the connecting frame 9 through the pawl 7 is 45°).

[0050] The second screw rod 12 penetrates through the fixed frame 8 and the brake spring plate 3, so that the brake spring plate 3 is hingedly arranged on the fixed frame 8. Since the brake spring plate 3 is hingedly arranged on the fixed frame 8, the brake spring plate 3 can rotate relative to the fixed frame 8.

[0051] The spring roller 4 is arranged on the brake spring plate 3; under the action of the external force pressing the connecting frame 9, the connecting frame 9 drives the ratchet wheel 6 to rotate in one direction through the pawl 7, and then the spring roller 4 successively abuts against the concave surfaces 61 and the convex surfaces 62;

[0052] The brake spring 3 is provided with a friction surface 31. Firstly, the connecting frame 9 is pressed by external force, so that the connecting frame 9 drives the ratchet wheel 6 to rotate in one direction through the pawl 7 (the pawl 7 abuts against the gear tooth 63, and the connecting frame 9 drives the ratchet wheel 6 to rotate in one direction by an angle of 45° each time through the pawl 7), and then the spring roller 4 abuts against the convex surface 62, at this time, the friction surface 31 abuts against the surface of the caster 2, and the trolley is in the state of "braking". Then, the external force is removed, the connecting frame 9 returns to the original position under the elastic force of the second reset spring 11 (the connecting frame 9 drives the pawl 7 to slide to the previous gear tooth 63, at the same time, the first reset spring 5 presses the other end of the pawl 7, and the pawl 7 abuts against the gear tooth 63 again). Finally, the connecting frame 9 is pressed by external force again, so that the connecting frame 9 drives the ratchet wheel 6 to rotate in one direction through the pawl 7 (the pawl 7 abuts against the gear tooth 63, and the connecting frame 9 drives the ratchet wheel 6 to rotate in one direction by an angle of 45° each time through the pawl 7), and then the spring roller 4 abuts against the concave surface 61, at this time, the friction surface 31 is separated from the surface of the caster 2, and the trolley is in the state of "debraking". In the emergency, the braking system device can respond quickly, provide reliable safety guarantee, prevent the trolley from running out of control or sliding, and improve the operation safety and experience of the trolley.

[0053] The pedal 14 is fixed at the rear end of the connecting frame 9, and the pedal 14 is pressed when the connecting frame 9 needs to be pressed by external force. The trolley body 15 is arranged on the fixed frame 8, and the goods to be loaded can be placed on the trolley body 15.

[0054] The trolley wheel brake system device comprises brake spring 3, spring roller 4, first reset spring 5, ratchet wheel 6, pawl 7, fixed frame 8 and connecting frame 9, the rear end of the fixed frame 8 is hinged with the front end of the connecting frame 9; the ratchet wheel 6 is rotatably arranged at the front end of the connecting frame 9, the surface of the ratchet wheel 6 is evenly distributed with concave surface 61 and convex surface 62 in the radial direction, the brake spring 3 is hingedly arranged on the fixed frame 8, and the spring roller 4 is arranged on the brake spring 3; the ratchet wheel 6 is further provided with a plurality of teeth 63, the pawl 7 is movably arranged on the front end of the connecting frame 9, one end of the first reset spring 5 is arranged on the connecting frame 9, and the other end of the first reset spring 5 presses the pawl 7, so that the pawl 7 abuts against the tooth 63; under the action of external force, the connecting frame 9 drives the ratchet wheel 6 to rotate in one direction through the pawl 7, and then the spring roller 4 abuts against the concave surface 61 and the convex surface 62 in turn, and the brake spring 3 is provided with a friction surface 31; under the action of external force, when the spring roller 4 abuts against the concave surface 61, the friction surface 31 and the surface of the caster 2 are separated from each other, and are in a "brake release" state; under the action of external force, when the spring roller 4 abuts against the convex surface 62, the friction surface 31 and the surface of the caster 2 abut against each other, and are in a "braking" state; in an emergency, the brake system device can respond quickly, provide reliable safety protection, prevent the trolley from losing control or sliding, improve the operation safety and experience of the trolley, and solve the problem that the trolley in the prior art does not have a brake system device, and the safety and experience are very poor.

[0055] Obviously, the above-described embodiments are only some embodiments of the present application, not all embodiments, and the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be implemented in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some technical features. Any equivalent structure made by using the contents of the specification and drawings, directly or indirectly applied to other related technical fields, is also within the scope of the patent protection of the present application.

Claims

1. A trolley wheel brake system apparatus, characterized by, It comprises brake spring, spring roller, first reset spring, ratchet, pawl, fixed frame and connecting frame, the rear end of the fixed frame is hinged with the front end of the connecting frame; The ratchet is rotatably arranged at the front end of the connecting frame, the surface of the ratchet is evenly distributed with concave and convex surfaces in radial direction, the brake spring is hingedly arranged on the fixed frame, and the spring roller is arranged on the brake spring; The ratchet is further provided with a plurality of teeth, the pawl is movably arranged on the front end of the connecting frame, one end of the first reset spring is arranged on the connecting frame, and the other end of the first reset spring presses the pawl, so that the pawl abuts against the teeth; Under the action of external force, the connecting frame drives the ratchet to rotate in one direction through the pawl, and then the spring roller abuts against the concave and convex surfaces in turn.

2. The stroller caster braking system apparatus of claim 1, wherein, The concave surface is four, and the convex surface is four.

3. The stroller caster braking system apparatus of claim 1, wherein, The angle of each one-way rotation of the connecting frame driving the ratchet through the pawl is 45°.

4. The stroller caster braking system apparatus of claim 1, wherein, It further comprises a wheel leg support and a caster, the caster is arranged at the bottom end of the wheel leg support, and the front end of the fixed frame is arranged on the wheel leg support.

5. The stroller caster braking system apparatus of claim 4, wherein, It further comprises a first screw rod and a second reset spring, the first screw rod penetrates the front end of the connecting frame, the second reset spring and the ratchet; one side of the second reset spring abuts against the fixed frame, and the other side of the second reset spring abuts against the connecting frame.

6. The stroller caster braking system apparatus of claim 5, wherein, It further comprises a second screw rod, the second screw rod penetrates the fixed frame and the brake spring, so that the brake spring is hingedly arranged on the fixed frame.

7. The stroller caster braking system apparatus of claim 6, wherein, It further comprises a third screw rod, the third screw rod penetrates the fixed frame, so that one side of the second reset spring abuts against the fixed frame.

8. The stroller caster braking system apparatus of claim 4, wherein, The brake spring is provided with a friction surface; Under the action of external force, when the spring roller abuts against the concave surface, the friction surface and the surface of the caster are separated from each other, and are in "brake release" state; Under the action of external force, when the spring roller abuts against the convex surface, the friction surface and the surface of the caster abut against each other, and are in "braking" state.

9. A trolley wheel brake system arrangement as claimed in any one of claims 1 to 8, characterised in that, It further comprises a pedal, the pedal is fixedly arranged at the rear end of the connecting frame.

10. The stroller caster braking system apparatus of claim 9, wherein, It further comprises a stroller body, the stroller body is arranged on the fixed frame.

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